simplereferenceobject.hxx

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
 * This file is part of the LibreOffice project.
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * This file incorporates work covered by the following license notice:
 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
 *   contributor license agreements. See the NOTICE file distributed
 *   with this work for additional information regarding copyright
 *   ownership. The ASF licenses this file to you under the Apache
 *   License, Version 2.0 (the "License"); you may not use this file
 *   except in compliance with the License. You may obtain a copy of
 *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
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/*
 * This file is part of LibreOffice published API.
 */
 
#ifndef INCLUDED_SALHELPER_SIMPLEREFERENCEOBJECT_HXX
#define INCLUDED_SALHELPER_SIMPLEREFERENCEOBJECT_HXX
 
#include "osl/interlck.h"
#include "salhelper/salhelperdllapi.h"
 
#include <cstddef>
#include <new>
 
namespace salhelper {

class SALHELPER_DLLPUBLIC SimpleReferenceObject
{
    static const size_t nStaticFlag = 0x80000000;
 
public:
    SimpleReferenceObject(): m_nCount(0) {}

    void acquire()
    {
        if (!(m_nCount & nStaticFlag))
            osl_atomic_increment(&m_nCount);
    }
 
    void release()
    {
        if (!(m_nCount & nStaticFlag) &&
            osl_atomic_decrement(&m_nCount) == 0)
            delete this;
    }

    static void * operator new(std::size_t nSize);

    static void * operator new(std::size_t nSize,
                               std::nothrow_t const & rNothrow);

    static void operator delete(void * pPtr);

    static void operator delete(void * pPtr, std::nothrow_t const & rNothrow);
 
protected:
    virtual ~SimpleReferenceObject() COVERITY_NOEXCEPT_FALSE;

    void staticize()
    {
        m_nCount |= nStaticFlag;
    }
 
    oslInterlockedCount m_nCount;
 
private:
    SimpleReferenceObject(SimpleReferenceObject &) SAL_DELETED_FUNCTION;

    void operator =(SimpleReferenceObject) SAL_DELETED_FUNCTION;

    static void * operator new[](std::size_t) SAL_DELETED_FUNCTION;

    static void operator delete[](void * pPtr) SAL_DELETED_FUNCTION;
};
 
}
 
#endif // INCLUDED_SALHELPER_SIMPLEREFERENCEOBJECT_HXX
 
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